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Process for producing alkyl aromatic hydroperoxide

A hydroperoxide and alkyl aromatic technology, applied in the preparation of peroxy compounds, chemical instruments and methods, and the preparation of organic compounds, can solve difficult stability and practical methods, difficult solid catalysts, performance Degraded organic compounds etc.

Inactive Publication Date: 2007-07-25
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in these conventional methods, there is a problem that there is an organic compound that may be degraded by decomposition, or a solid catalyst that is difficult to handle is added, and therefore, these methods are difficult to be used for obtaining a high oxidation reaction rate. Said to be a method with excellent stability and practicality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] In the pressure-resistant glass container of 1 liter, add the 5.2wt% cumene solution of 500g containing cumene hydroperoxide (CMHP) and by ferric acetate with 16.7g containing sodium carbonate and organic acid sodium salt (containing sodium formate and sodium acetate ) in an aqueous solution to dissolve the prepared solution. The iron concentration in the added liquid was 0.5 wt·ppm in terms of iron metal. The reaction was carried out at 95° C. and an air flow of 0.7 MPa for 4 hours. The amount of supplied air was controlled so that the oxygen concentration at the outlet of the reactor was maintained at 2 vol% during the reaction. After the reaction, the concentration of cumene hydroperoxide in the reaction mixture was 11.6 wt%.

Embodiment 2

[0028] In a similar reactor to that used in Example 1, 520 g of oil containing 25 wt % of m-diisopropylbenzene, 40 wt. % of m-hydroperoxym-diisopropylbenzene as raw material for the reaction and A solution prepared by dissolving iron acetate with 17 g of an aqueous solution containing sodium carbonate and organic acid sodium salts (containing sodium formate and sodium acetate). The iron concentration in the added liquid was 0.1 wt·ppm in terms of iron metal. The reaction was carried out at 90° C. and an air flow of 0.3 MPa for 6 hours. The amount of supplied air was controlled so that the oxygen concentration at the outlet of the reactor was maintained at 5 vol% during the reaction. After the reaction, the concentration of m-diisopropylbenzene dihydroperoxide in the reaction mixture increased by 6.2 wt%.

[0029] Comparative example 1

[0030] The reaction was performed in the same manner as in Example 2 except that no iron acetate was added. After the reaction, the concen...

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Abstract

A process for producing an alkyl aromatic hydroperoxide, which comprises oxidizing an alkyl aromatic compound with an oxygen-containing gas in the presence of a water-soluble iron compound, wherein a concentration of the iron compound in the oxidation reaction system is 0.0001 to 10 ppm by weight in terms of iron metal.

Description

technical field [0001] The present invention relates to a process for the preparation of alkylaromatic hydroperoxides. For example, cumene hydroperoxide obtained by oxidation of cumene is used for the industrial production of phenol, and ethylbenzene hydroperoxide obtained by oxidation of ethylbenzene is used for the production of propylene oxide by the Halcon process. Furthermore, dicumyl hydroperoxide obtained by oxidizing diisopropylbenzene is used as a raw material for the production of resorcinol or hydroquinone. Background technique [0002] In the process of producing alkylaromatic hydroperoxides by oxidizing alkylaromatic hydrocarbons using air, the addition of various catalysts to accelerate the rate of the oxidation reaction has been studied. For example, it is known to add metal compounds such as transition metal complex salt catalysts (for example, JP8-245568 A), polyvalent amine metal complex catalysts (for example, JP2000-119247 A) or transition metal compound...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C409/10C07C407/00
Inventor 大沼满秉竹智之石野胜
Owner SUMITOMO CHEM CO LTD
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